[9e86dd7d] | 1 | /* bsp_start() |
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| 2 | * |
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| 3 | * This routine starts the application. It includes application, |
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| 4 | * board, and monitor specific initialization and configuration. |
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| 5 | * The generic CPU dependent initialization has been performed |
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| 6 | * before this routine is invoked. |
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| 7 | * |
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| 8 | * INPUT: NONE |
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| 9 | * |
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| 10 | * OUTPUT: NONE |
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| 11 | * |
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| 12 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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| 13 | * On-Line Applications Research Corporation (OAR). |
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| 14 | * All rights assigned to U.S. Government, 1994. |
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| 15 | * |
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| 16 | * This material may be reproduced by or for the U.S. Government pursuant |
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| 17 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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| 18 | * notice must appear in all copies of this file and its derivatives. |
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| 19 | * |
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| 20 | * $Id$ |
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| 21 | */ |
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| 22 | |
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| 23 | #include <rtems.h> |
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| 24 | #include <bsp.h> |
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| 25 | #include <libcsupport.h> |
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| 26 | |
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| 27 | |
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| 28 | /* |
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| 29 | * The original table from the application and our copy of it with |
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| 30 | * some changes. |
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| 31 | */ |
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| 32 | |
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| 33 | extern rtems_configuration_table Configuration; |
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| 34 | rtems_configuration_table BSP_Configuration; |
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| 35 | |
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| 36 | rtems_cpu_table Cpu_table; |
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| 37 | |
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| 38 | /* Initialize whatever libc we are using |
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| 39 | * called from postdriver hook |
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| 40 | */ |
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| 41 | |
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| 42 | void bsp_libc_init() |
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| 43 | { |
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| 44 | extern int end; |
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| 45 | rtems_unsigned32 heap_start; |
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| 46 | |
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| 47 | heap_start = (rtems_unsigned32) &end; |
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| 48 | if (heap_start & (CPU_ALIGNMENT-1)) |
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| 49 | heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1); |
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| 50 | |
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| 51 | /* |
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| 52 | * The last parameter to RTEMS_Malloc_Initialize is the "chunk" |
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| 53 | * size which a multiple of will be requested on each sbrk() |
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| 54 | * call by malloc(). A value of 0 indicates that sbrk() should |
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| 55 | * not be called to extend the heap. |
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| 56 | */ |
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| 57 | |
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| 58 | RTEMS_Malloc_Initialize((void *) heap_start, 64 * 1024, 0); |
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| 59 | |
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| 60 | /* |
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| 61 | * Set up for the libc handling. |
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| 62 | */ |
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| 63 | |
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| 64 | if (BSP_Configuration.ticks_per_timeslice > 0) |
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| 65 | libc_init(1); /* reentrant if possible */ |
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| 66 | else |
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| 67 | libc_init(0); /* non-reentrant */ |
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| 68 | |
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| 69 | /* |
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| 70 | * Initialize the stack bounds checker |
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| 71 | */ |
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| 72 | |
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| 73 | #ifdef STACK_CHECKER_ON |
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| 74 | Stack_check_Initialize(); |
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| 75 | #endif |
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| 76 | } |
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| 77 | |
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| 78 | |
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| 79 | int bsp_start( |
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| 80 | int argc, |
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| 81 | char **argv, |
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| 82 | char **environp |
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| 83 | ) |
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| 84 | { |
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| 85 | /* |
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| 86 | * Allocate the memory for the RTEMS Work Space. This can come from |
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| 87 | * a variety of places: hard coded address, malloc'ed from outside |
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| 88 | * RTEMS world (e.g. simulator or primitive memory manager), or (as |
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| 89 | * typically done by stock BSPs) by subtracting the required amount |
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| 90 | * of work space from the last physical address on the CPU board. |
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| 91 | */ |
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| 92 | #if 0 |
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| 93 | a Cpu_table.interrupt_vector_table = (mc68000_isr *) 0/*&M68Kvec*/; |
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| 94 | #endif |
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| 95 | |
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| 96 | |
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| 97 | /* |
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| 98 | * Copy the Configuration Table .. so we can change it |
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| 99 | */ |
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| 100 | |
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| 101 | BSP_Configuration = Configuration; |
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| 102 | |
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| 103 | /* |
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| 104 | * Add 1 region for the RTEMS Malloc |
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| 105 | */ |
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| 106 | |
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| 107 | BSP_Configuration.maximum_regions++; |
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| 108 | |
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| 109 | /* |
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| 110 | * Add 1 extension for newlib libc |
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| 111 | */ |
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| 112 | |
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| 113 | #ifdef RTEMS_NEWLIB |
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| 114 | BSP_Configuration.maximum_extensions++; |
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| 115 | #endif |
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| 116 | |
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| 117 | /* |
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| 118 | * Add another extension if using the stack checker |
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| 119 | */ |
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| 120 | |
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| 121 | #ifdef STACK_CHECKER_ON |
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| 122 | BSP_Configuration.maximum_extensions++; |
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| 123 | #endif |
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| 124 | |
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| 125 | /* |
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| 126 | * Need to "allocate" the memory for the RTEMS Workspace and |
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| 127 | * tell the RTEMS configuration where it is. This memory is |
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| 128 | * not malloc'ed. It is just "pulled from the air". |
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| 129 | */ |
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| 130 | |
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| 131 | BSP_Configuration.work_space_start = (void *) |
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| 132 | (RAM_END - BSP_Configuration.work_space_size); |
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| 133 | |
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| 134 | /* |
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| 135 | * initialize the CPU table for this BSP |
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| 136 | */ |
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| 137 | |
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| 138 | /* |
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| 139 | * we do not use the pretasking_hook |
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| 140 | */ |
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| 141 | |
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| 142 | Cpu_table.pretasking_hook = NULL; |
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| 143 | |
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| 144 | Cpu_table.predriver_hook = bsp_libc_init; /* RTEMS resources available */ |
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| 145 | |
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| 146 | Cpu_table.postdriver_hook = NULL; |
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| 147 | |
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| 148 | Cpu_table.idle_task = NULL; /* do not override system IDLE task */ |
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| 149 | |
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| 150 | Cpu_table.do_zero_of_workspace = TRUE; |
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| 151 | |
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| 152 | Cpu_table.interrupt_stack_size = 4096; |
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| 153 | |
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| 154 | Cpu_table.extra_system_initialization_stack = 0; |
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| 155 | |
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| 156 | /* |
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| 157 | * Don't forget the other CPU Table entries. |
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| 158 | */ |
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| 159 | |
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| 160 | /* |
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| 161 | * Start RTEMS |
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| 162 | */ |
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| 163 | |
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| 164 | rtems_initialize_executive( &BSP_Configuration, &Cpu_table ); |
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| 165 | |
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| 166 | bsp_cleanup(); |
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| 167 | |
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| 168 | return 0; |
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| 169 | } |
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